Benefit Plans Option Plans (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Additional disclosure
Aggregate intrinsic value, outstanding	$ 10,489
Aggregate Intrinsic value, vested and expected to vest	7,719
Aggregate Intrinsic value, exercisable	7,719
Intrinsic value	60	$ 536	$ 277
Compensation expense	$ 905	$ 514	$ 943
Stock option
Number of Stock Options Outstanding
Options outstanding at the beginning of the year (in shares)	925,084
Granted (in shares)	249,000
Exercised (in shares)	(8,066)
Forfeited and expired (in shares)	(106,932)
Options outstanding at the end of the year (in shares)	1,059,086	925,084
Vested at the end of the year (in shares)	635,069
Exercisable at the end of the year (in shares)	635,069
Weighted Average Exercise Price Per Share
Options outstanding at the beginning of the year (in dollars per share)	$ 10.41
Granted (in dollars per share)	15.16
Exercised (in dollars per share)	8.70
Forfeited and expired (in dollars per share)	12.31
Options outstanding at the end of the year (in dollars per share)	11.35	$ 10.41
Vested at the end of the year (in dollars per shares)	9.09
Options exercisable at the end of the year (in dollars per share)	$ 9.09
Weighted average remaining contractual life
Outstanding at the end of the year	6 years 3 months 18 days
Vested at the end of the year	4 years 10 months 24 days
Exercisable at the end of the year	4 years 10 months 24 days
Additional disclosure
Unrecognized compensation expense	$ 1,000